<https://w3id.org/zericatalog/date/1981-04-1981-04> <http://www.w3.org/2000/01/rdf-schema#label> "1981/04-1981/04" .
<https://w3id.org/zericatalog/date/1981-04-1981-04> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.cidoc-crm.org/cidoc-crm/E52_Time-Span> .
<https://w3id.org/zericatalog/date/1981-04-1981-04> <http://www.ontologydesignpatterns.org/cp/owl/timeinterval.owl#hasIntervalStartDate> "1981-04-01-01T00:00:00Z" .
<https://w3id.org/zericatalog/date/1981-04-1981-04> <http://www.ontologydesignpatterns.org/cp/owl/timeinterval.owl#hasIntervalEndDate> "1981-04-01-01T00:00:00Z" .
<https://w3id.org/zericatalog/date/1981-04-1981-04> <http://www.cidoc-crm.org/cidoc-crm/P86_falls_within> <https://w3id.org/zericatalog/date/xx> .